Answer:
200 CM
Explanation:
To improve the acoustics in auditorium, a sound reflector with mass of 200 kg is suspended by a chain from the ceiling. what is its weight? what force (magnitude and direction) does the chain exert on it? what is the tension in the chain? assume that the mass of the chain itself is negligible.
Answer:
W = 1960 N
T = 1960 N in the upward direction
Explanation:
Let's apply Newton's second law to this exercise with acceleration equal to zero, translational equilibrium
Weight is
W = m g
W = 200 9.8
W = 1960 N
In the attachment we can see a diagram
T -W = 0
T = W
T = 1960 N
in the upward direction
credit - somebody else
in a circuit with two identical components connect in parallel, the current which flows through it's different branches are different or the same
Answer:
same,
my advise is you add more points it will make everyone anwser quicker.
find not true when the water freezes...
Answer: i think its c
Explanation:
Answer:
a
Explanation:
Based on the law of conservation of energy, which statement is correct?
A Energy is always being added to all parts of the Universe.
B. Energy is often destroyed in some parts of the Universe.
O C. Energy in a closed system cannot change forms.
D.
Energy in an isolated system remains constant.
Answer:
D. Energy in an isolated system remains constant
Explanation:
I recently took this test and this was the correct answer. Please like if this helped you! :)
The statement "Energy in an isolated system remains constant" is correct which is based on the law of conservation of energy option (D) is correct.
What is the law of conservation of energy?The law conservation of energy can be defined as the energy that cannot be created either it cannot be destroyed it only can change from one state to another state.
As we know, from the definition of the law of conservation of energy,
The energy that cannot be created either cannot be destroyed.
According to the rule of conservation of energy, the energy in an isolated system doesn't change.
Thus, the statement "Energy in an isolated system remains constant" is correct which is based on the law of conservation of energy option (D) is correct.
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A boy does 20j of work in 4s. Find his power
power = work done / time taken
= 20/4
= 5 watt
hope it helps
25. The distance between two successive crests in a wave is 1.5 m, and the source generates 50 crests and 25 troughs in 10.0 s. What is the speed of the waves? Please explain to me, Thank You!
Because the frequencies is the "numbers of waves per second" and the wavelengths is the "distance each wave," multiplying the two results in "distance per second." Dimensional analysis can be used to confirm this.
How can you determine the wave speed?Wave speed and wavelength are related by the wave speed equations (Speed => Wavelength x Frequency). The wave speed can be determined using this equation if the wavelengths and frequency are known. The numbers of waves that travel each second is known as the wave frequency.
What is the wave example's speed?The speed of a sea waves is 3 m/s if the wave's crest covers 30 meters in 10 seconds. In contrast hand, if the ocean wave's peak moves 40 meters in ten seconds, then the wave is moving at a pace of 4 meters per second.
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a small object is placed between two plane mirrors inclined at an angle of 60° to each other in a dark room how many images are seen explain
Answer:
nothing
Explanation:
bocouse of darkness
Some people say it is rare to get HIV from a blood transfusion in the United States. True or false? Why?
Answer:
False
Explanation:
Because there is a 90% chance of contracting HIV from a blood transfusion
Please Help And Fast!!!!
A boat’s velocity changes as it reaches the dock.
Which situations would cause the boat’s velocity to change?
Select three that apply.
A. The boat is slowing down.
B. The boat is speeding up.
C. The boat is changing direction.
D. The boat is not changing direction.
If the velocity of the boat is changing, then the boat is changing direction.
option C.
What situations would cause the boat’s velocity to change?
The velocity of a boat can change due to various factors such as;
wind resistance, water currents, engine power, and the boat's interaction with the dock.Additionally, the boat's velocity can change if the boat's pilot applies the brakes or changes the direction of the boat. The boat's velocity can also be influenced by the shape and weight distribution of the boat, the speed of the water, and the presence of other boats and objects in the water.
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Find the acceleration of an object when the force is 850 N and the mass is 85 kg.
A. 0 m/s2
B. 7.3 x 104 m/s2
C. 0.1 m/s2
D.10 m/s2
i need help please and don't be putting random things i will report
Answer:
1: Because matter has many different forms.
2: The materials that are shown can be organized into 3 different forms; solid, liquid, and gas.
3: The image of the liquids is most likely a material that cannot be found in nature. Liquids have many useful properties, but it depends on the liquid. Bleach is a liquid that has is very useful for sterilizing. Water is useful because without it, life on earth would not exist. And there are many more liquids, but I am going to cut it short here because there too many to put down.
Explanation:
Pls mark Brainliest with the crown.
Which situation involves an object that can be considered to be in free fall?
A) a bungee jumper just before reaching the bottom of a jump.
B) a ball at the top of its motion after being thrown straight up in the air.
C) a helicopter that is hovering above a freeway. D) a meteor traveling through the atmosphere
Answer:
B: Only the ball experiences no resistive force to its state of motion.
The second principle of friction loss illustrates that: a. friction loss and velocity are unrelated b. friction loss develops much faster than change in velocity c. friction loss develops much slower than change in velocity d. friction loss develops at the same rate as change in velocity
The correct answer is c. friction loss develops much slower than change in velocity.
The second principle of friction loss states that as the velocity of a fluid increases, the friction loss within the system increases, but at a much slower rate compared to the change in velocity. In other words, the increase in friction loss is not directly proportional to the change in velocity. This principle is based on the fact that as the fluid moves faster, the pressure drop due to friction along the pipe walls increases, resulting in some energy loss. However, this energy loss is not as significant as the increase in velocity itself. Therefore, the friction loss develops much slower compared to the change in velocity.
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If there is a new moon today, in how many days will the next full moon occur?.
A man fires a shot while in a deep canyon with parallel cliff walls. The temperature in the canyon is 27.0°C. If the echo from one wall is heard in 1.50 seconds, and the echo from the other wall is heard 1.00 second later, how wide is the canyon?
The canyon is approximately 258 meters wide.
What is the width of the canyon?The speed of sound in air depends on the temperature, and we can use the formula:
v = 331.4 + 0.6T
where;
v is the speed of sound in meters per second, and T is the temperature in Celsius. At a temperature of 27.0°C,The speed of sound is:
v = 331.4 + 0.6(27.0)
v = 343.8 m/s
Let's call the distance to one wall "d". When the man fires the shot, the sound travels to the wall, reflects, and returns to the man.
The total distance traveled is 2d. The time it takes for the sound to travel this distance is:
t = 2d/v
Similarly, for the other wall, the total distance traveled is 2(D - d)
where;
D is the width of the canyon.The time it takes for the sound to travel this distance is:
t + 1.00 = 2(D - d)/v
We can solve these equations for d and D:
d = vt/2
D = (v/2)(t + 1.00)
Substituting in the values we have:
d = (343.8 m/s)(1.50 s)/2 = 257.85 m
D = (343.8 m/s/2)(1.50 s + 1.00 s) = 515.70 m
Therefore, the width of the canyon is:
D - d = 515.70 m - 257.85 m = 257.85 m
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kohler illumination allows optimal viewing of a specimen by:
Kohler illumination is a technique used in microscopy to achieve optimal lighting conditions for viewing a specimen. It involves adjusting the light source and microscope components to ensure even distribution and focus of light on the specimen. By minimizing glare and shadows, Kohler illumination improves contrast and enhances the clarity of the specimen, allowing for better visualization of fine details and structures.
Kohler illumination is a technique used in microscopy to achieve optimal lighting conditions for viewing a specimen. It involves adjusting the light source and microscope components to ensure that the light is evenly distributed and focused on the specimen.
By properly aligning the light source, condenser, and objective lens, Kohler illumination minimizes glare, improves contrast, and enhances the clarity of the specimen. This technique is particularly important in brightfield microscopy, where the specimen is viewed against a bright background.
With Kohler illumination, the light is focused on the specimen in a way that minimizes shadows and provides uniform illumination. This allows for better visualization of fine details and structures within the specimen, making it easier to observe and study.
Kohler illumination is commonly used in various fields of biology, including cell biology, histology, and microbiology. It is an essential technique for achieving optimal viewing conditions and obtaining high-quality images of specimens.
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Kohler illumination allows optimal viewing of a specimen by providing even and controlled illumination.
Kohler illumination is a technique used in microscopy to achieve uniform and adjustable illumination of the specimen. It involves focusing the light source at the back focal plane of the objective lens, which creates a well-distributed and parallel beam of light that passes through the specimen. By properly aligning the condenser, aperture diaphragm, and field diaphragm, Kohler illumination minimizes artifacts, enhances contrast, and improves the overall image quality.
Kohler illumination is an essential method in microscopy that ensures optimal viewing of specimens. It enables the observer to visualize the specimen with even illumination, reducing glare and enhancing details. This technique is widely used in various microscopy applications, such as brightfield microscopy, phase contrast microscopy, and fluorescence microscopy. By implementing Kohler illumination, researchers and scientists can achieve accurate and high-quality imaging, allowing for detailed observations and analysis of microscopic specimens.
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A squeeze bottle squeezes when pressed. It regains its shape when pressed .It regains its shape when the pressure from your hand is withdrawn. What may happen if the squeeze bottle is pressed to take the sauce out and then immediately corked tightly? Will it regain its shape? If not, Why?
Answer:
The squeeze will not regain its shape
Explanation:
The squeeze bottle will not regain its shape.
This is because the atmospheric pressure compresses the squeeze bottle. Since the pressure in the squeeze bottle is now not equal to the atmospheric pressure since it has been corked tightly, its internal pressure cannot balance out the atmospheric pressure and thus cancel its effect.
So, the squeeze bottle does not regain its shape due to this imbalance of pressure.
Which of the following does not change as a skater goes down a ramp?
-Thermal Energy
-Gravitational potential energy
-Total Energy
-Kinetic Energy
Answer:
total energy
Explanation:
law of conservation of energy
name the gas that is released into the test tube and state how we test for the gas released
The name of the gas that is released into the test tube is Oxygen and the test is the glowing splint test.
How to test for oxygen ?The Elodea plant releases oxygen when sunlight is present as it undergoes the process of photosynthesis, converting carbon dioxide and water into glucose and oxygen with the help of energy from sunlight.
You can determine whether oxygen is present by performing the glowing splint test. First, you need to light a wooden splint and ensure that it is glowing but not in flames. Carefully collect the gas emitted from the Elodea plant in a suitable container such as a test tube. Afterward, swiftly insert the still-glowing splint into the collected gas' container or test tube. If the gas comprises mainly oxygen, the glowing splint will reignite and burn more intensely than before, indicating the existence of oxygen.
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The full question is:
A test tube is filled with water and a green plant called Elodea. When the plant is exposed to sunlight, it begins to produce bubbles.
Name the gas that is released into the test tube and state how we test for the gas released .
Which phenomena of light is shown in the given diagram? b) The given figure is for blue light, what will be the change in the angle of deviation of red light is used? c) Why is the angle of refraction less than angle of incidence for a glass prism? d) Which light ray is an emergent ray in the following diagram? e) Which colour of light travels fastest through a glass prism? f) How is dispersion different from scattering
The given diagram shows refraction of light. The incident ray is pq and the emergent ray is rs. Due to the higher density of glass than air, the incident angle is greater than the refracted angle.
What is refraction ?Refraction, is the phenomenon of bending of light when it travels from one medium to the other. Here, the diagram shows how light bends when it passes from air to the glass prism.
Here, the incident light is pq and the emergent ray from the prism is rs. If red light is used instead of blue, the angle of deviation will be shorter.
orange -red region will travel through the prism more fastly than the violet -blue colors because , higher wavelength is associated with more speed.
Dispersion of light is the separation of the white light into its component colors, whereas, scattering is the spreading of the same color through out a medium or vacuum
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How is a plant able to cycle matter through the processes of cellular respiration and photosynthesis?
The carbon cycle refers to the processes by which carbon in the biosphere is recycled. Photosynthesis sucks carbon dioxide out of the atmosphere, while cellular respiration releases it into the environment. Photosynthesis is the process by which solar energy reaches a plant and is converted into glucose.
How photosynthesis and cellular respiration are similar:
Photosynthesis is a method by which plants and other organisms transform light energy into chemical energy, which is then released to fuel the organism's metabolic activities through cellular respiration.
This planet has bedrock, reddish dust, and ice caps. What planetary body is it? Source: NASA James Bon Cornell University, Michael Wolff (Space Science Institute), and the Hubble Heritage Team (STSCVAURA) Neptune Earth's moon Mars Mercury Venus
Mars is the planetary body that has bedrock, reddish dust, and ice caps. This information comes from sources such as NASA, James Bon Cornell University, Michael Wolff (Space Science Institute), and the Hubble Heritage Team (STSCVAURA).
Mars, the fourth planet from the Sun in our solar system, is characterized by its reddish appearance due to the iron oxide (or rust) present in its soil and dust. The bedrock on Mars is made up of various types of rocks, such as basaltic rocks and sedimentary rocks, which have been shaped by geological processes over time. In addition to the bedrock and reddish dust, Mars is also known for its ice caps, which are primarily composed of water ice with some frozen carbon dioxide. These ice caps are located at the planet's north and south poles and provide valuable information about Mars' climate history and potential for future human exploration.
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What is the vector sum of (7,5) and (13,-5)?
To add or subtract two vectors, just add or subtract the corresponding components. This is:
(7, 5) + (13, -5) = (7+13 , 5-5) = (20, 0)
Calculate the power in the 1 ohm resistor. What do I do?
Answer:
p1 = 9 watt
Explanation:
first find the current :
i = V/r1 +r2 = 12 / (1+3) = 3 A
Next, find the voltage in the 1 ohm resistor:
V1 = r1 * i = 1 * 3 = 3 volt
Now calculate power in the 1 ohm resistor :
P1 = i * V1 = 3 * 3 = 9 watt
Verify that the intermediate value theorem applies to the indicated interval and find the value of c guaranteed by the theorem. f(x) = x2 5x 1, [0, 9], f(c) = 15
This is also numerically proved by solving f(c) = 15 ⇒ c² - 5c + 1 - 15 = 0,which can be written as c² - 5c - 14 = 0, whose solutions are c = 7 and c = -2, but -2 doesn't belong to [0, 9]. Hence, c = 7.
According to the intermediate value theorem, since f(0) = 1 and f(9) = 67, there is at least one number c in the interval [0, 9] such that f(c) = 15.
The Intermediate Value Theorem states that if a function is continuous on the closed interval [a, b], then it must have at least one value c in the open interval (a, b) such that f(c) is equal to any number M,
where f(a) ≠ M and f(b) ≠ M.
If f(x) = x² - 5x + 1 and [0, 9] is given,
we can see that: f(0) = 1,f(9) = 67.
From the theorem, we know that f(c) = 15 since 15 lies between f(0) and f(9).
therefore, here exists a number c in the interval [0, 9] such that f(c) = 15.
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A glass falls from a table top and smashes on the floor 0.6 seconds later. How high is the table?
Equations that can be used
Vv=gt, dv=1/2gt^2, t=2d/g.
Answer:
1.8 m
Explanation:
Given: Glass falls from a table, smashes 0.6 seconds later
To find: How high a table is
Formula: Vv=gt, dv=1/2gt^2, t=2d/g
Solution: A table's height is measured from the top of the edge down to the floor. The tables are shown both have a height of 30 inches, which is common for many tables.
Data
t = 0.6sg = 9.81 m/s²d = ?Equation
d = \(\frac{1}{2}\)\(gt\)²Math & Units
d = 4.905 (0.6²)d = 442.676Hence the table is 1.8 m high
Which of the following has the most kinetic energy?
A. stretching a rubber band
B. a jet flying through the air
C. throwing a paper airplane
D. pitching a baseball
Draw a flowchart and write its pseudocode to convert temperature from Celsius to Fahrenheit. F=(C×2)+30
A flowchart and write its pseudocode to convert temperature from Celsius to Fahrenheit is shown below.
How to write a pseudocode and create a flowchart?The pseudocode for a program that requests for a number (temperature) from an end user, converts temperature from Celsius to Fahrenheit, and then prints or outputs (displays) the converted temperature to the user is written below.
In this context, a pseudocode to convert temperature from Celsius to Fahrenheit can be written as follows;
START
Input "Enter a number" into variable F
F = (9/5)C + 32
PRINT C
STOP
In conclusion, we would use Microsoft Visio to create a flowchart that converts temperature from Celsius to Fahrenheit as shown in the image attached below.
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a battery made up of two cells joined in series supply current to an external resistance of each cell is 0.6v and 3 ohms respectively. calculate 1 the current flowing in the external resistance 2 the thermal potential difference 3 the lost voltage
Answer:
We have a battery here, composed of two cells joined in series, which is supplying current to an external resistance. The voltage of each cell is given as 0.6 volts and the resistance is 3 Ohms. In order to solve the problem, we need to calculate three things: the current flowing in the external resistance, the thermal potential difference and the lost voltage.
First, let's calculate the current flowing in the external resistance. Using Ohm's Law, we can find the current as I = V/R, where V is the total voltage of the battery (i.e. 2*0.6=1.2V) and R is the external resistance, which is given as 3 Ohms. Therefore, I = 1.2/3 = 0.4 amps.
Next, let's calculate the thermal potential difference. This is the amount of heat generated by the current flowing through the external resistance, and is given by the formula P = I^2*R, where P is the power, I is the current, and R is the resistance. Plugging in the values, we get P = 0.4^2*3 = 0.48 watts. Since we know that power is equal to voltage times current (P = VI), we can rearrange the formula to get V = P/I, which gives us V = 0.48/0.4 = 1.2 volts.
Finally, we need to calculate the lost voltage. This is the voltage drop that occurs across each cell due to internal resistance. We can use the formula V_lost = I*R_int, where R_int is the internal resistance. Since we know the current and the resistance of the external load, we can use the total voltage of the battery to find the internal resistance. Recall that the total voltage of the battery is 1.2V. Therefore, V_lost = I*R_int, or R_int = V_lost/I. We know that the voltage drop across each cell is equal, so we can divide the lost voltage by 2 to get the voltage drop across each cell. Therefore, V_cell = V_lost/2 = (0.4)*(R_int/2). Plugging in the values, we get V_cell = 0.4*(1.2-0.4*3)/2 = 0.06 volts.
In summary, the current flowing in the external resistance is 0.4 amps, the thermal potential difference is 1.2 volts, and the lost voltage across each cell is 0.06 volts.
AP Physics Question 3
A planet has two moons, Moon and Moon , that orbit at different distances from the planet’s center, as shown.
Astronomers collect data regarding the planet, the two moons, and their obits. The astronomers are able to estimate
the planet’s radius and mass.
3. The masses of the two moons are determined to be for Moon and for Moon . It is observed that
the distance between Moon and the planet is two times that of the distance between Moon and the
planet. How does force exerted from the planet on Moon compare to the force exerted from the planet on
Moon ?
The gravitational force exerted from the planet on Moon is two times larger than the gravitational force
exerted from the planet on Moon .
B
The gravitational force exerted from the planet on Moon is eight times larger than the gravitational force
exerted from the planet on Moon .
C
The gravitational force exerted from the planet on Moon is two times smaller than the gravitational force
exerted from the planet on Moon .
D
The gravitational force exerted from the planet on Moon is eight times smaller than the gravitational force
exerted from the planet on Moon .
Gravitational force increases as the mass increases and decreases as the distance between the bodies is increased.
The correct option is; The gravitational force exerted from the planet on Moon A is eight times larger than the gravitational force exerted from the planet on Moon B.Reasons:
The given parameters are;
The moons of the planet = Moon A and Moon B
Mass of Moon A = 2·M
Mass of moon B = M
The distance between Moon B and the planet = 2 × The distance between Moon A and the planet
Required:
Comparison (compare) of the force exerted from the planet on Moon A and Moon B.
Solution:
The force, F, exerted from the planet is the gravitational force which is given by Newton's Law of Gravitation as follows;
\(\displaystyle F = \mathbf{G \cdot \frac{M_{planet} \times M}{R^2}}\)Where;
G = Universal gravitational constant
\(M_{planet}\) = Mass of the planet
M = Mass of the Moon
R = The distance from the planet to the Moon
For Moon A, we have;
Mass = 2·M
Distance = R
Which gives;
\(\displaystyle F_A = G \cdot \frac{M_{planet} \times 2\cdot M}{R^2} = 2\cdotG \cdot \frac{M_{planet} \times M}{R^2} = \mathbf{2 \cdot F}\)
With Moon B, we have;
Mass = M
Distance = 2·R
Therefore;
\(\displaystyle F_B = G \cdot \frac{M_{planet} \times M}{(2 \cdot R)^2} = G \cdot \frac{M_{planet} \times M}{4 \cdot R^2} = \frac{1}{4} \cdot G \cdot \frac{M_{planet} \times M}{R^2} = \mathbf{\frac{1}{4} \cdot F}\)
Which gives;
\(\displaystyle \frac{F_A}{F_B} = \frac{2 \cdot F}{\frac{1}{4} \cdot F } =2 \times \frac{4}{1} = \mathbf{8}\)
\(\displaystyle \frac{F_A}{F_B} = 8\)
\(F_A = \mathbf{8 \times F_B}\)
The force from the planet on Moon A, \(F_A\), is 8 times the force from the planet on Moon B.
Therefore, whereby option B is;
The gravitational force exerted from the planet on Moon A is eight times larger than the gravitational force exerted from the planet on Moon B.The correct option is option B
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